The Eagles will be the best running team in the NFL in 2015. That makes it reasonable to think they will field the most prolific running back duo of all time.Philadelphia has the ideal situation to make it happen: A run-heavy play Derrick Johnson Jersey -caller in Chip Kelly, an elite run-blocking line and two new veteran backs DeMarco Murray and Ryan Mathews who will thrive together in Kellys power-rushing scheme.PREDICTIONS: Murray will repeat as rushing champ | Eagles will take NFC EastThe late great Walter Payton and Bears backfield mate Roland Harper produced an unsurpa sed 2,387 yards rushing combined from the position in 1978. The same year, a booming one for running games around the league, the Patriots set the single-season team record of 3,165.Its not a stretch for Murray and Mathews to help the Eagles displace the first mark. With an a sist from holdover Darren Sproles, they cant be ruled out of chasing the second.In Kellys first season in 2013, the Eagles hit 2,019 yards, averaging 5 yards on 400 running backcarries. Last year, it fell to 1,810 yards despite 415 carries from the position.It took Payton and Harper getting 573 combined carries for the record, but at only 4.2 yards per carry. In 2009, the Panthers DeAngelo Williams and Jonathan Stewart needed 427 to post the second-highest total of 2,250 yardsat 5.3 per carry.For Murray and Mathews the reasonable number is Cairo Santos Jersey 480, or 30 per game, at 5.0 per carry, to hit 2,400 together. There are many reasons for the Eagles to have such an uptick in carries. Murray just proved he can handle well more than 300 carries, and up to 200 seems right for Mathews.MORE: Why Packers are Sporting News pick to winSuper Bowl 50They will want to run more to bring ease to Sam Bradford, who isnt dealing with the most established wide receivers.They'll want totake better advantage of having superior blocking tight ends (Brent Celek, Zach Ertz) to flank their now healthy quartet of elite road graders (Jason Peters, Evan Mathis, Jason Kelce, Lane Johnson)The Eagles invested $26 million guaranteed on Murray and Mathews, upgrading while spending the same amount LeSean McCoy got this offseason after they traded him to the Bills.Earlier this week, NJ.com discovered the Eagles head coachexplained in detail why he'dpreferhis current backs over McCoy during a lecture he gave at USC in 1998.We do not want a jingle-footed back trying to hit a home run, Kelly said then. We want him to hit the ball into the line and get the tough yards. We are a blue-collar guy going to work. When we talk to the back, we tell him it is speed through the Larry Johnson Jersey hole, not speed to the hole.The stats support his new backs, too. Murray, with the Cowboys last season, gained a league-high 998 rushing yards after contact, more than half of his league-leading 1,845.In his two 1,000-yard seasons with the Chargers, 65 percent of Mathews' yards came after contact in 2011, and in 2013, 51 percent of his total came after getting hit.They are both more pure physical runners, while McCoy, as his cut on a dime Twitter handle suggests, focuses on hisspeed to try to turn the corner. It worked well in 2013, but his dropoff from No. 1 to No Derrick Thomas Jersey . 55 inPro Football Focus position rankings in 14 was unacceptable.It didnt take long for Murray to show he's a better matchfor Kelly.Hes a perfect fit for us, exactly what we want to do: Downhill, full-steam ahead, running backs coach Duce Staley told reporters this week. All the backs we have, theyre able to do that.It just means the Eagles are also in the perfect position to make NFL rushing history.